Which of the Following Are Acceptable in Relationships Between Purchasers

Multiple Choice

Which of the following are acceptable in relationships between purchasers and suppliers? 

A)  Accepting gifts from a supplier. 
B)  Extending a deadline for a competitive bid to one of your suppliers. 
C)  Engaging in a personal friendship with a supplier sales representative. 
D)  Accepting invitations to purchase tickets to a charity dinner.